Question
How can I sort this array of objects by one of its fields, like name or count ?

  Array
(
    [0] => stdClass Object
        (
            [ID] => 1
            [name] => Mary Jane
            [count] => 420
        )

    [1] => stdClass Object
        (
            [ID] => 2
 

            [name] => Johnny
            [count] => 234
        )

    [2] => stdClass Object
        (
            [ID] => 3
            [name] => Kathy
            [count] => 4354
        )

   ....

Answer :
Use usort, here’s an example adapted from the manual:

function cmp
 
($a, $b)
{
    return strcmp($a->name, $b->name);
}

usort($your_data, "cmp");

edits imported from comments:

If you’re sorting the array from inside the class and your sorting function cmp is also defined inside the class, then use this:

usort($your_data, array($this, "cmp"))

參考：